Cutting-tool for wood-carving machines



W. C. STENGER.

cunme TOOL FOR WOOD CARVING MACHINES.

APPLICATlON FILED JUNE 6,198-

Patented Feb. 10,1920.

g UNITED STATES PATENT-OFFICE.

ILLEBA 'nC. were, orcnrcneo, ILLin'oIs.

' CUTTING-TOOL non WOOD-CARVING'MACHiNES.

Application filedJ'une e, 1918. Serial No. 238,489.

To all whom it may concern;

Be it known that I, WILLEBALD O. STEN- GER, a citizen of the UnitedStates, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Cutting-Tools for Wood-CarvingMachines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and. to the letters of referencemarked thereon, which form apart of this specification.

This invention relates to improvements in cutting tools for woodcarvingmachines and consists of the matters hereinafter. described and moreparticularly pointed out in the appended claims. I

The object of the invention is to providean eflicient rotary cuttingtool for use in wood carving machines, which may be easily made andsharpened, and which is of such shape as to operate to the bestadvantage on flat work as well as work of other forms. Another object ofthe invention is to rovide a cutting tool which will act to save a cleancut and burnished surface, thus eliminating the necessity of againoperating upon the wood for the removal of cutter marks. These objectsas well as the several advantages of my invention will be more apparentas I proceed with my specification.

In the drawings:

Figure 1 represents a erspective view of a rotary cutting tool em odyingmy invention, as observed from the front or cutting edge side thereof.

Fig. 2 represents a view in side elevation of the tool as it wouldappear when turned a quarter of a revolution from the position shown inFig. 1.'

Fig. 3 represents a view in rear elevation of the tool as it wouldappear when turned a half of a revolution from the position shown inFig. 1.

Fig. 4 represents a horizontal sectional view through the tool, theplane of the section being indicated by the line H of Fig. 1.

Fig. 5 represents a bottom plan view of the cutting tool.

Referring now in detail to that embodiment of my invention illustratedin the accompanying drawings :10 indicates the V Specification ofLetters Patent. Patented Fb,

tool as a whole which comprises ashank 11 andfa cutting head 12formedatone-end of said shank. The shank 11 in this instance is shown ascylindrical, but as is apparent,

said shank may be made in other shapes to fit the particular tooLholdingchuck with which itis used.

The bottom end of the shank v11 grad ually' flattened upon oppositevsides to pro; vide a tapering neck 18, which is twisted spirally aboutthe axis of the shank. as a center for ajshort distance, after which itis bent into a planeat substantially aright angle to the shank to form asemi-cylindrical flange memberl l. This flange member is.conoavo-convex, with its convex bottom surface 15 substantiallyapproxlmatingvapart of a sphere, althoughits contour may be somewhatvaried.

The flange member 14 terminates in a bevel edge 16 which extendsradially from the axis ofthe shank and which is beveled on the top sideof the'fiange member to pro vide the sharpened cutting edge 16 of thetool head. As is apparent from the drawings, this cutting edge is'of alength, equal to the radius of the flange member 14 and of courseassumes the curvature thereof.

The operation of the tool when used in connection with the rotatingchuck of a carving machine, is as follows. Thework piece to be operatedupon is moved into a suitably operative position to be operated upon bythe tool, which may be rotated by any suitable means. The workisadvanced toward the tool and the cutting edge 16* cuts away that partof the work in its path, in the form of small chips or shavings Whichare directed upon the flange member 14. Under the centrifugal action ofthe rotation of the .tool, these chips are thrown or deposited adistance away from that part of the work just previously. engaged by andalso that part of the work in advance of the cutting edge of the head,thus in no way obliterating such pattern lines as are to be followedupon the work. 7

As the cutting edge 16 removes the chips, that part of the convex bottomsurface 15 immediately adjacent the cutting edge, will actto smooth andburnish that part of the work just operated upon to provide a smoothedge in which all of the pores of the wood will be closed.v By reason ofthe shape of the I cutting head, I am enabled to operate upon flat workas Well as'Work of othe'rfshapes, and I am also enabled to use said toolas a gouge, thus bein able to follow form patterns such as scrol s, etc.

My improved toolacts tov throw the chips or shavings clear from itselfand from the work, thus it can never become clogged. The tool may beeasily sliarpenedancl it may receive a great many sharpenings before itsefficiency as a tool for its intended purpose is changed or, destroyed.The improved tool is capable of efficient operation at a 'slibstantiallyslow speed when compared With other tools for a like ppm pose, whichmust be driven at a high speed.

While in describing my inventionI have t referred to certain details ofconstruction andarr'ange'rnent of parts, I do not Wish to be limitedthereto except as may be pointed out in the appended claims.

I claim as my invention:

1. A cutting tool comprising an integral headand shank, the shank beingflattened on opposite sides to form a neck tapering towar the head, thehead comprising a con cave-convex flange member extending in a "planesubstantially as right angles to the axis of the shank and t rminatingin a sharpened cutting edge extending radially to the shaft.

2. A tool of the kind described, comprisarcnatelength and terminating ina sharpened cutting edge arranged radially of said shank. 3

8. A tool of the kind described, comprising a shank and ahead, Jsaidshank'being flattened on opposite sides to form a tapering neck, whichtwisted into a radial, c'oncavo -convex flange member arrangedsubstantially at right angles to said shank, said flange member being180 in 'arcnate length and terminating in a radial edge which issharpened on its top sideto form the cutting edge for said head. '7

In testimony, that I claim the foregoing as my invention I my signaturein the presence of two Witnesses, this 29th day of May A. D. 1918.

WILL-EBALD C. STENGER.

- Witnesses:

TAYLO'R G. BROWN, BERTHA L. MACGREGOR.

